Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3428e1167012f51…

MALICIOUS

PDF

201.4 KB Created: 2021-07-08 03:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e96d9824daa380189979a72d0af5b92 SHA-1: 35f14cae628622d06d7a058c87b094310af69415 SHA-256: d3428e1167012f5177eb87fae0789c202c18683eb1e53d22f176b9704b596242
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains numerous links, many of which point to compromised WordPress sites hosting PDF files. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses urgent language to prompt user interaction. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8931

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://philabc.ru/uplcv?utm_term=how+to+sync+wii+remotes+to+console
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072e64a8df36---28232261082.pdf
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/23440521557.pdf
    • http://clinical-pain.com/pds/userfiles/files/36000233413.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/934ea1feaab0e709cc497712fa3d43a5/71544294647.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/73f4b2b6f3dad1228c5ce8e7b7608a7d/12817930380.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160de44ffbb0a5---warexif.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc37d34c1b1---noguzobat.pdf
    • http://giga.sk/storage/file/mudenopewoxorifomaru.pdf
    • http://tramtronbetong.com/uploads/userfiles/file/96099534417.pdf
    • https://ferdavagnar.is/images/fck/file/31315123067.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/0r60n8gnrjf8ajjrtuklnj52d7/kukaw.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb88a6de6e---padifepusujuj.pdf
    • http://collegium-connect.nl/ckupload/files/91403006338.pdf
    • http://niezapominajkowo.eu/userfiles/file/97259180102.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0982a901f---34155077825.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/c20ca51bc1230611b659d3b4676a93b8/35299575128.pdf
    • http://erictex.com/ufiles/files/42765375966.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/4f7918bc84c58385abb76a6d4bae3aba/47127585106.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/9d8cbdc308ee0042f704ddfc610aa09b/rodepevofalofajusaxoz.pdf
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/bunizoroligadozebi.pdf
    • http://thaoduocquyhiem.com/userfiles/image/file/52895381977.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/h0nk6ljj5llf7itjbrkfhdqmlm/memanodifovus.pdf
    • http://dush-kz.ru/uploads/fck/file/30868222109.pdf
    • http://amphorabeautyclub.com/campannas/file/64535831857.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00028c9e.bin
642ff90700f1b63de8672ab812f3652660d4cd7ed80c80468664dddf11cc0244
pdf-font-stream PDF embedded font (sfnt) at offset 0x28C9E 12464 bytes
font_01_sfnt_off0002b500.bin
04fcf45a9aa35479bb7175617899cf1d4760df8797521f1e87e57d32b1784525
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B500 19156 bytes
font_02_sfnt_off0002e7ca.bin
4e551327aff7e645c9eba7005c895a7a857089fa158d99ca265f277bcec21ebc
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7CA 10420 bytes
font_03_sfnt_off0002ff6e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF6E 16792 bytes